Use a tilegrid for bench_playback.

tools/bench_playback.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "BenchTimer.h"
 #include "SkCommandLineFlags.h"
 #include "SkForceLinking.h"
 #include "SkGraphics.h"
 #include "SkOSFile.h"
 #include "SkPicture.h"
+#include "SkPictureRecorder.h"
 #include "SkRecordDraw.h"
 #include "SkRecordOpts.h"
 #include "SkRecorder.h"
 #include "SkStream.h"
 #include "SkString.h"
 
 __SK_FORCE_IMAGE_DECODER_LINKING;
 
 DEFINE_string2(skps, r, "skps", "Directory containing SKPs to read and re-record.");
 DEFINE_int32(loops, 10, "Number of times to play back each SKP.");
@@ skipping 70 matching lines @@
             continue;
         }
 
         if (src->width() * src->height() > kMaxArea) {
             SkDebugf("%s (%dx%d) is larger than hardcoded scratch bitmap (%dpx).\n",
                      path.c_str(), src->width(), src->height(), kMaxArea);
             failed = true;
             continue;
         }
 
-        bench(scratch.get(), *src, filename.c_str());
+        // Rerecord into a picture using a tile grid.
+        SkTileGridFactory::TileGridInfo info;
+        info.fTileInterval.set(FLAGS_tile, FLAGS_tile);
+        info.fMargin.setEmpty();
+        info.fOffset.setZero();
+        SkTileGridFactory factory(info);
+
+        SkPictureRecorder recorder;
+        SkCanvas* canvas = recorder.beginRecording(src->width(), src->height(),
+                                                   &factory,
+                                                   SkPicture::kUsePathBoundsForClip_RecordingFlag);
+        src->draw(canvas);
+        SkAutoTUnref<SkPicture> replay(recorder.endRecording());
+
+        bench(scratch.get(), *replay, filename.c_str());
     }
     return failed ? 1 : 0;
 }
 
 #if !defined SK_BUILD_FOR_IOS
 int main(int argc, char * const argv[]) {
     return tool_main(argc, (char**) argv);
 }
 #endif